[SVG2] Add getters and setters to SVG*List interfaces.

Source/core/svg/SVGFEConvolveMatrixElement.cpp

 /*
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 185 matching lines @@
     int orderXValue = orderX()->currentValue()->value();
     int orderYValue = orderY()->currentValue()->value();
     if (!hasAttribute(SVGNames::orderAttr)) {
         orderXValue = 3;
         orderYValue = 3;
     }
     // Spec says order must be > 0. Bail if it is not.
     if (orderXValue < 1 || orderYValue < 1)
         return nullptr;
     RefPtr<SVGNumberList> kernelMatrix = this->m_kernelMatrix->currentValue();
-    size_t kernelMatrixSize = kernelMatrix->numberOfItems();
+    size_t kernelMatrixSize = kernelMatrix->length();
     // The spec says this is a requirement, and should bail out if fails
     if (orderXValue * orderYValue != static_cast<int>(kernelMatrixSize))
         return nullptr;
 
     int targetXValue = m_targetX->currentValue()->value();
     int targetYValue = m_targetY->currentValue()->value();
     if (hasAttribute(SVGNames::targetXAttr) && (targetXValue < 0 || targetXValue >= orderXValue))
         return nullptr;
     // The spec says the default value is: targetX = floor ( orderX / 2 ))
     if (!hasAttribute(SVGNames::targetXAttr))
@@ skipping 27 matching lines @@
 
     RefPtr<FilterEffect> effect = FEConvolveMatrix::create(filter,
                     IntSize(orderXValue, orderYValue), divisorValue,
                     m_bias->currentValue()->value(), IntPoint(targetXValue, targetYValue), m_edgeMode->currentValue()->enumValue(),
                     FloatPoint(kernelUnitLengthXValue, kernelUnitLengthYValue), m_preserveAlpha->currentValue()->value(), m_kernelMatrix->currentValue()->toFloatVector());
     effect->inputEffects().append(input1);
     return effect.release();
 }
 
 } // namespace WebCore